Method of making couplings



April 22, 1930, B'. E. DQHNER 1,755,210

METHOD OF MAKING COUPLINGS Filed Aug. 5, 192'?4 INVENTORj F|G-4 4LATTORNEY'.

Patented Apr. 22, 1h30 i i I i l UNITED STATES PATENr OFFICE BURT E.DOHNER, F OAKWOOD, NEAR DAYTON, QHIG METHOD OF MAKING COUIEZIZIINGrSv lApplication led August 5, 1927. Serial No; 210,983.

This invention relates to a new and useful s ion sleeve 8 against thetaper 3 01E it and method of making a coupling. y tightly around thetube. When pressure is It is the principal object of my inventionapplied against the body of the sleeve by the to provide a method ofcoupling two cylinnut, the thin connecting wall 7 between it dricalmembers. `Under this method a comandthe sleeve will be broken, whereuponthe 55 pression sleeve which is made a part of the sleeve, as a separatepiece, will be forced by coupling nut of a tube coupling, may be septhenut tightly against the taper of the fitarated from the nut within thefitting by ting and around the tube to form a rigid, breaking a thinwall connection between. the non-leaking connection between them. The i0nut and sleeve. The nut, as a. disconnected breaking of the connectionbetween the nut 60 element, may then be forced more tightly and sleeveenables the latter to be more around the tube to more thoroughlyaccomtightly forced around the tube and the better modate itself to anyirregularities in the latto accommodate itself to irregularities in theter or the taper of the fitting, A soft metalv tube and thetaper.

tube or rod may thus be connected to a flt- Having described myinvention, I claim 65 ting with-.extreme permanence and rigidity l. Themethod of vcoupling two cylindri` Without the use of solder or softpacking. cal members, which consists 1n forming one Other important andincidental objects memberwith a threaded recess having a tawill Vbebrought out in the following specipellng inner end CO IeCeiVe the Othermember,

2e fication and particularly set forth in the subthen applying a' thinlyconnected double 70.

joined claims, sleeve unit tao the cylindrical member, the

In the accompanying drawings illustratrear part fsaid unit beingthreaded and itsv ing my invention, Figure 1 is a side elevafront partbeing compressible, then forcing tional View of the Coupling assembled.'Fig` s`a1d unitinto the recess until the connection ure 2 is a sectionalView of the coupling bebetween its front and rear parts is broken, 75fore it is assembled. Figure .3 is a longtuand then forclng thecompressible part of the dinal sectional view taken through the couunitas a Separate piece into the tapering end pling after it has beentightened up. And of the recess, by screwing the threaded part Fi ure 4is a side view of the compression of the unit further into the recess,for the 3e sleeve tightly compressed u on a tube, show purposespecified. 80 'in the nut disconnected rom it upon the 2. The .method ofconnecting a soft metal tu e, l cylindr1cal member to a iittmg havin aReferring to `the accompanying drawings threaded recess to receive theother mem er,

for a detailed description of my invention, Sel@ I'eCeSS heylrlgetapering inner end, 3;, the numeral -1 designates a, fitting formedwhich consist-s 1n applying to said'cylindri- F with a threaded nur,receiving bore geeincal member a compression sleeve and a nut municatingthrough a tapered portion 3 with v Connected by a 'Ihn Walla thenscrewing the n hole 4, nut 1nto the'tting'to force 4the compression F01'the Purpose 0f connecting a, member Sleeve lll'ltO Said leCeSS t0. breakthe thin Wall such as the tube 5 to the fitting 1, I. provide betweenthe Sleeve and the unt, and there- 9 a, coupling nut 6 adapted te beScrewed into after'screwlng the nut further into the fitting theinteriorly threaded ortion 2 of the fit t0 OIC@ the Slew?" as n SeparatePiece into ting. Connected by a thin wall'7 of. reduced the tnpellngPOItlOn 0f the recess ofthe diameter to the front end of the couplingnut httng, f01` the PUIPOSG SPeCled is a compression sleeve 8 offru'stro-conicalv In Wllness whereof I have hereunto Set my 95 sectionand having a bead 9 turned vupon it hndvthlS 2nd day 0f All 11st, 1927.near its :front end. f BUR E. DOHNER.

When the fitting. 1 has been applied to the I tube 5, as shown in Figure3, the nut 6 is I 5o screwed into the fitting to forcev the compres- 10

